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Associating Inter-image Salient Instances for Weakly Supervised Semantic Segmentation

  • Ruochen Fan
  • Qibin Hou
  • Ming-Ming Cheng
  • Gang Yu
  • Ralph R. Martin
  • Shi-Min Hu
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11213)

Abstract

Effectively bridging between image level keyword annotations and corresponding image pixels is one of the main challenges in weakly supervised semantic segmentation. In this paper, we use an instance-level salient object detector to automatically generate salient instances (candidate objects) for training images. Using similarity features extracted from each salient instance in the whole training set, we build a similarity graph, then use a graph partitioning algorithm to separate it into multiple subgraphs, each of which is associated with a single keyword (tag). Our graph-partitioning-based clustering algorithm allows us to consider the relationships between all salient instances in the training set as well as the information within them. We further show that with the help of attention information, our clustering algorithm is able to correct certain wrong assignments, leading to more accurate results. The proposed framework is general, and any state-of-the-art fully-supervised network structure can be incorporated to learn the segmentation network. When working with DeepLab for semantic segmentation, our method outperforms state-of-the-art weakly supervised alternatives by a large margin, achieving \(65.6\%\) mIoU on the PASCAL VOC 2012 dataset. We also combine our method with Mask R-CNN for instance segmentation, and demonstrated for the first time the ability of weakly supervised instance segmentation using only keyword annotations.

Keywords

Semantic segmentation Weak supervision Graph partitioning 

Notes

Acknowledgments

This research was supported by the Natural Science Foundation of China (Project Number 61521002, 61620106008, 61572264) and the Joint NSFC-ISF Research Program (project number 61561146393), the national youth talent support program, Tianjin Natural Science Foundation for Distinguished Young Scholars (NO. 17JCJQJC43700), Huawei Innovation Research Program.

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Tsinghua UniversityBeijingChina
  2. 2.Nankai UniversityTianjinChina
  3. 3.Megvii Inc.BeijingChina
  4. 4.Cardiff UniversityCardiffUK

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